If you have screenshots, add them in, and i'll happily move this over to the report section for you. Otherwise it's just accusations that we can't follow up on :/
EDIT: to be honest, those screens make it look like you were pking him. He's on his mount the whole time, which he couldn't be if he was pking you, his name isn't flashing, and the guards seemed to have attacked you.
If you have any better screens, please post them.